Horotec Magtest MSA 19.910 User Manual

USER_MSA19.910/EN

1

TABLE OF CONTENTS

1. The magnetic field

2. Description

3. How to interpret the magnetic field with this device

4. Operation

5. Connections

5.1 AC adapter

5.2 Switching on the device

5.3 Switching off the device

5.4 Battery

6. Settings

6.1 Mute

6.2 Info

6.3 Reset

6.4 Auto

7. Screen information

8. Functions

9. Settings

10. Switching on the device

10.A Magnetism detection

10.B Demagnetization

10.C Compass mode

10.D Settings

11. Important information

12. Safety precautions

3
4
4
4
5
5
5
5
5
6
6
6
6
6
6
7
8
9
9
11
12
13
16
17

N.B. :
Press the function keys for about half a second to activate them.

2

1. THE MAGNETIC FIELD

A magnetic field is manifested by a force affecting certain materials in its environment,
acting on moving electrical charges. The magnitude of this force decreases as a function
of the distance between the magnetic field emitter and its action point. Magnetization
is a vector quantity which characterizes on a macroscopic scale the magnetic behaviour
of a material sample. It is measured in amperes per metre (A/m) or in Tesla (T). (1)

Ferromagnetism designates the ability of certain material samples to become magnetised
under the effect of an external magnetic field, and to retain part of this magnetisation.
On a microscopic scale, a ferromagnetic material can be described as a set of independent
magnetic domains (Weiss domains).
When the magnetic moments of the domains are not aligned, the total magnetostatics
energy of the material is minimised: the material is not magnetised.
(2)

For demagnetization purposes, a damped magnetic excitation field is applied so
that certain domains are reversed more than others, depending on the magnetic
excitation force passing through them. This leads to a state of magnetic disorder
equivalent to the state of a non-magnetized material. (3 and 4)

(1)

(2)

(3)

(4)

There are relatively intense magnetic fields all around us in daily life. It goes without saying that mechanical watches are
influenced by them, and thereby undergo potentially significant operating variations, i.e. which affect the rate precision.

It should be noted that the Earth’s magnetic field varies between 25 and 65 μT, depending on geographic position.
The most significant items in everyday life which can affect the rate of a mechanical watch by means of a magnetism effect
are computers, mobile phones, TVs, refrigerators, etc. Magnetic flux measurements (taken at 10 cm from the source) have
revealed values of 60 μT for an electric toothbrush, 75 μT for a mobile phone and 110 μT for a computer. Consider too that
watchmaking tools often have a magnetic charge capable of disrupting the rate of a watch !

The distance at which a watch is placed from the magnetising object is an important factor. Although watch manufacturers
regularly equip their cases with protective materials or opt for non-magnetic components, nevertheless rate problems due
to magnetism remain very common.

3

2. DESCRIPTION

The HOROTEC© MAGTEST is an electronic device for the detection of magnetism in μTesla (μT), demagnetization and control
of magnetic remanence of watches, movements, tools and watch parts.
It combines the measurement function with the demagnetization function in a single device.
After demagnetization, the residual magnetism value in μT can be checked again.

A. Detection of the degree of magnetism in μTesla with display of the magnetic remanence.

B. Demagnetization cycle.

DEMAG

DETECT

3. HOW TO INTERPRET THE MAGNETIC FIELD WITH THIS DEVICE

Large metal parts, such as a movement, modify the lines of the earth’s magnetic field. For this reason, an indicative value
of up to 50 μT can be considered without any influence or consequence on the functioning of the movement.
For small parts, such as screws, the displayed values must be considered as real remanence values.

4. OPERATION

DETECT ZONE : Surface for detecting the degree of magnetism.
A. Measures the micro Tesla value (μT) of the degree of magnetization.

DEMAG ZONE : Demagnetization surface.
B. Demagnetization.

C. Compass mode.

D. Settings.

A. Detection of the degree of magnetism B. Demagnetization

4

5. CONNECTIONS

1. AC adapter : connect the adapter to rear jack of the device HOROTEC© Magtest. Connect the cord of the AC adapter
to the mains supply (115 or 230 V).

2. Switching on the device on : press the ON/OFF button located at the rear panel of the device.

3. Switching off the device off : press the ON/OFF button located at the rear panel of the device.

Connections on the rear panel of the device :

Power supply sector 115 - 230 V Button ON/OFF

4. Battery : unscrew the battery cover on the back of the HOROTEC© Magtest and insert the 9 V battery delivered
with the device.

Note : change the battery if the «low battery» symbol appears on the screen when the device is turned on.

Battery cover

The HOROTEC© Magtest is delivered with an adapter (input 115 - 230 V AC / output 12 V DC), a 9 V battery and
instructions for use.

5

6. PARAMETERS

1. Mute : silent mode or sound mode. see paragraph 10D2

INFO

2. Info : hardware and software version. see paragraph 10D3

3. Reset : sensors resetting. see paragraph 10D4

AUTO

4. Auto : activate or deactivate the automatic mode. The object can be moved from the DETECT ZONE to the

DEMAG ZONE without having to press the key

DEMAG

. see paragraph 10D5

7. SCREEN INFORMATION

When this symbol is visible, the device is in automatic mode.

AUTO

To activate/deactivate the

When this symbol is visible, the device emits sound signals.
When this symbol does not appear on the display, the
To activate/deactivate the

When this symbol is visible, the device is connected to the 115 - 230 V mains supply.

When this symbol is visible, the device runs on the battery. The number of green bars indicates the battery
charge level.

Compass mode. see paragraph 10C

1. Display of the compass mode.

2. North compass calibration.

function, see paragraph 10D5

function is activated, and the device is silent.

function, see paragraph 10D2

Return to the main menu.
Press this key at any time to return to the main menu.

Settings. see paragraph 10D

Sleep mode screen :

1. When the device is connected to the mains supply (115 - 230 V), the screen goes to sleep mode after 2 minutes without

use. To reactivate its operation, press the ON/OFF button located at the rear panel of the device.

Display in sleep mode.

Touch the screen to return to the main menu.

2. When the device is running on the battery, the screen goes to sleep mode after 2 minutes without use. To reactivate its
operation, press the ON/OFF button located at the rear panel of the device.

6